Car-truck.



K. F. NYSTROM.

CAR TRUCK.

APPLICATION FILED DEC. 29. 1917.

1 ,%88,146. Patented Dec. 17, 1918.

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. iunrn KARI; FBITJOE NYSTMM, OI ST. LAMBERT, QUEBEC, CANADA.

CAR-TRUCK.

To all whomc't mag/concern:

Be it known that I, KARL FRITJOF, NYsrnoi i, a subject of the King of Sweden, and resident of 80 Edison avenue, in the town of St. Lambert, in the Province of Quebec, 1n the Dominion of Canada, have invented certain new and usefullmprovementsflin Carifruclrs, of which the following is the specification.

The invention relates to improvements in car-trucks as described in the present specification and illustrated in the accompanying drawings that form part of the same. The invention consists essentially oi the novel features in the side frames, whereby the upper and lower arch; bars are distanced.

at the central portions in such. a manner as to secure an equitable distribution of the load.

The objects of the invention are devise I a truck, that will be serviceable and strong and withstand rough usage, rapid changes of temperature and sundry other causes,

whichtend toward the loosening of bolts and other fastenings, to 'furnish. a better carrier for greater loads and generally to provide an etficient, cheap and durable structure for the aforesaid purposes.

In the drawings, Figure 1 is an elevation ofthe side frame. y r

Fig. 2 is a longitudinal sectional view of the side frame on the line A-B in Fig.- 1.

Fig. 3 is a vertical sectional view onthe line CD in Fig. 1.

Fig. i is a plan view from above.

Like numerals of responding parts in each figure;

Reterringto the drawings, the numerallr indicates the upper arch bar and the nu:- meral 2 the lower arch bar. I Y As customary the upper arch bar is a compression member and the lower arch bar a tension member, these .members being brought together at'the ends and fastened bolts or rivets. I

From the joinings the sharply descends to the central column'3,

said column 3 being preferably U-shaped in.

' tributing the load. Various changes may struction Without departing from the spirit h of the invention so long as they'are within of the side frame reference indicate corp'per' arch bar .1 slightly rises and the lower arch ba 2 j Speo iflcationof Letters Patent. Paiiygntgfl Egg, 1'? 191$, Application filed December 29, 1917. I Serial Ho. 209,456.

. wardlv at 8 to form a fastening for the bolster, said projections terminating intermediate "of the depth of the column to permit the removal of the bolster.

- The reinforcing ribs 9 and 10 extend from the upper portions of the sides 4 and 7 and the former project into and are integral with the brake beam brackets 11.

Immediately under the side 5 the sides 4 and 7 are slotted at 12 to receive the upper arch bar 1, which extends through said column and is rigidly secured thereto by the rivets l3. 1 p

The side flanges letproject from the lower side 6 of the column \3 "and supportjthe spring plank l5.

The lower arch bar 2 extends through .the

lower channel of the column 3, and thetie strap 16 extends under the said lower arch bar and the two members are secured to the column 3 by the rivets 17.

It will be seen that by this construction, a

the vertical sides 4' and 7 of the column 3 become tensionmembers, as the weight'of the car body transmitted through the bolster draws on the lower arch bars and lsaid vertical sides and through. this tension strain bear on the upper arch bars, which in their turn relieve the tension strain on the lower arch bars and column'thereby equitably disbe made' in the conlow the top transverse member through which'said upper arch bar is inserted, said bottom transverse member being channeled Iion the under side to receive said lower arch Signed at the city'of Montreal, Quebec, Canada, this-27th day of November, 1 917.

KARL FRITJ OF NYSTROM. Witnesses:

"V. I. Fnmnsronmwon, B. Paterson. 

